Scaffold



M. HERMAN.

SCAFFOLD.

APPUCATIDN FILED ran. 28. 1932!.

M. HERMAN.

SCAFFOLD.

APPLICATION FILED FEB. 28. I921.

3 SHEETS-SHEET 2.

W WV

Patented Jan. 24, 1922.

Jr ZZ/IZ 07"/ fleflfizalz M. HERMAN.

S'CAFFOLD.

APPLICATION nuzn nan. 2a. 1921.

Patented Jan. 24, 1922.

3 SHEETS-SHEET 3 m mung 1a 711/ mjlueri ofi' rg flew/71am IHHIII lllllllllllll J6 Ju UNITED STA'EQH PATENT OFFICE.

MEYER HERMAN, OF GHICAGO, ILLINOIS.

souroLn.

A lication fiieci'rbru y 192i." s mi n3. 415,450.

To all'whom it may concern:

"Be it knownthat I; Micron IIERMAN, a citizenof th'e United States;-[res'itlin-g at 1 Chicage, in the c0unty*-of--Coolt and State'of illinois', .lu'ive iii-vented certain new and usefill Improvenients in "See-fields; of wh ch the a =minim'iim sp'ao when folded-"and which may be extended in length andheight to accommodtite nny conditions of worl-r'.

Thesceffoldds-intended for use by decoretors, paper hangers, painters, and the lik'eyand is especially a'da pta ble'for such. use

beceuse of' its.capai'bility of being compacted into small dimensions convenient for transportation. One of the pari ventionisto provide endsupports that are rigidly stable wh'eni laterally-extended :for

use so thatthe suspend-ednpletfornr will not materially sway or totter under-the superimposed. weight of there-on. v r :-"Another object isto provide at each end the 'workmnn supported of E the structure I :folding 1 steps by means of which the-:worln'nan. may conveniently ascend or climb'up tothe'pletform with very little effort or loss of time.

7 Another 'objectis to provide u scaffold in Other, further and offthe invention will become-readily apparent, to persons skilled in. the art, fronr n which vall -of".the parts are joined together Swthet'Iia-bilityof leaving any-of the-parts at tliep'litce"Wherri thwstructure is used -is eliminated. I-1' more specific objects consideration of the -fo'llowiing:= description,

when taken in iconj unction; with the accompanyingldrawings;whcrein'F I I 'Fig.1 is a sideelevation of the scaffold extended for neg-showing in dotted'lines oneoftheend: supports or trestles folded.

Fig. 2 is an end elevation of Figil. Fig.6 is an enlarged section taken on line 3+3iof Figs.- 1c-end 2. e. 2'

on on enlargedscule', this section being'taken onlineHofFigi Fig: 5 is aiseotion taken on line Fig.4.

specification (II-Letters Patent. ;Pa t.ented.

uler objects oi the in-' of-a' cross member-24, as at 25.

lun view of one end Jan. 24, 1922.

F 1g. 6 is a. plan new of the scaffold when folded.

' V ig. 8 is a section through the pivoted ends ofi'e..pair-,of legs. I --"In, all the views the some reference churactersarejemployedto indicate similar parts. "The dew-cc consists of two folding trestles, 10%en-d;11-,-endan extensible platform pivotally'connected at each end to the respective trestles through a vertically slidalble support to form zr-sca'ifold. :"As both of the trestles' =a;re -substantiztllyialike I will describe only -one,-wit h 'theunderstan'ding that all that is tobe-sz id-ebout the one will apply with equal force and'efi'ect to the other.

Each trestle istprovided with four diverging legsytwo inner-legs 13-13 andtwo outer legs-14-14; The legs 13 and 14 are arranged with respect to each other so that their widest sidesere at right angles. The

legs 14 bear upon the upper-end a metal cap 15." The-pert or cap 15extends around the upper ends of eech'of thelegs 14, and over the-top; as; clearly shown in Fig. .8, and within which the legs 13 are pivoted, as at- 16. A metal-strip 17 is also passed around the upper ends of thelegs 13, through which the rivet 16 pessesinorder to strengthen and protect the upper ends of these legs.

An angle iron 18 is bent around the upper end'ofthe legs 14*undis held in place bv the bolts l-9 which pass through it and thrhimh the side walls-of the cap 15. A bolt 0 passes througlrthe upper end of the legs llfttIlCllS pivotally connected to a suspended frame 21 and is the-means by which the leg structure, at the respective sides of the scaffold, may swivel; V

The--frame comprises two vertically de- Jending, parallel membeis 22. which'suspend om the bolt 20 and which have, at intervals, notches-23. The lower end of the memhers 22-ereoonnected to the respective ends The plat form supporting: frame 26 consists of the side plates 27 and 28, mede'in e box-like form tie" horizontal walls 99-30, the parts being securedtogetherby any proper means. 'End plates 31 end 32 provideguidee for movement on the vertical, parallel members 22 and 22. The platform 12 is supported on the frame member 26 by the hin e members 34 and 35. The platform consists of two 7 is a section taken on line 77 of relatively sliding members made of alternating bars 36 and 37, that are capable-f being longitudinally exten dad and whicli'are connected together by cleats 38 and 35f r'espectively. f v

' Inside of the structure 26. are pivoted latch members orj'spring-pressed dogs 40 and 41, pivoted to the side plates 27. and 28.. The

latch dogs i0 and'lare held yieldinglyoiit 'wardly cxtendedby a. doubled ended spring f43, to yieldingly engage the notches 23- -+23 -regpe'ctiyely, in the frame 21.

ear the center of he structure 26 anew theinside thereof isa plate 4,4 s 'ecui'ed to a l'OtBtfl'blG'ltltCh member 4:5..which eatends oiitside of thecasing in the handle 45, Links 46ers pivoted to the plate 44 an t th-reable framestructlire 26, may be adjusted in the platform may conveniently be'raised or.

speotive dogs 40 and'41, so that jwhen the handle-is rotated, the do 5 will be there- 13 they engage;v r a v Now it Wlll be apparent that, when the dogs are .removed in this mannerfrom the notches thatthe: end of thefplatformf 12,

which is supported'upon the verticallyslidvertical position to.change the height of the platform by causing the do-gs to engage any air of the vertical-series of the notches 23 in the frame members 21. By this means lowered to suit the workman ancl to conform to the height of the ceiling or the wall upon which he may be working.

Pivoted'to'each of the legs 14and14 iisja link 4949. 7 They diverge inwardly and are connected to the two cross bars=50 and f 51.- :Similarly, 52 and 52 are connected to the legs 13-13" respectively, andathey are pivoted to the links 49- 49, as. at 53-53'.-

1 The, bar 51 is outwardlydeflected, as at 54, and the outwardly deflected part contains a gn'otch to overlie the bar-24 to hold the latter in vertical position and revent the frame and platform from swinging.

- Each pair oflegs, 13 8116.14,}18 pivoted by.

the bolt 20-20,- so as to move outwardly with respect to the members 22' and-22', and the legs 13 and 14 move outwardly and diverge from each otherg-as shown-in Fig-1, being held in this positionby means o'f-the links 49 and 52.

Two part cross braces 55. and56 are pivoted, as at 57 and 58, to the respective pair of legs 14. Each of these braces are ivoted together, as at 59, and are-held in aligning position by a part of one brace engaging in a notch of the other, as at 60, so that the legs 14 may be brought into parallel relation when the device is to be folded, as clearly shown in Fig. 6.

'A cross link consisting of two parts, 62 and 63, hinged at the points 58 tow the le s 14 and 14., respectively, are also hinge together, as at 64. The part 65 holds them in removed from the note es with aligning-position; This composite brace holds the legs e te n ded, as clearly shown in step or arm*66 is pivoted, as at 67,-'to the leg 13 andiextends'outwardlywhere it is piv} "ct-ed, as at 68, to a vertical liiilrfi the latter being pivoted to the cross-brace 52} seat 170. 1

to assist 'theo platform 12; inged traps? 1 and 7 2 are pivotally on on either side of the; strnctnre when folded ,together, as more-clearly-shownin Fig, 6, fOlj-{tllQPIllPOSG oi holding theparts in 'colperatorin mounting to the .The arm 66 and-,thebracej52.1serve as steps nected to the legslS and 14' to'exten'dacross;-

na i s. 2. i, He 1- haveherein-shofvnaisingleembodiment of my inventionfor thepnrpose of clear disclosurefitTwill he fmanifestto 'per-- sons skilled int'he 'art that 'manychanges rangemntlof P thescope o the P en ed claims. 1.

Having described; my inv'entionfwhatclaim as new and desireto'secure' by Letters Patents, is

1 A device-of]thef character: described having two like trestl'es, eachtrestle comprising fouri'diverging, legs, aqpair oni'each.

side; a platform supporting frame;l suspended from and hinged'to each pair of legs andextending downwardly-to a point near the vertical mid-portion of thetrestles;

may be madeinthe general form and arholding means connecting the-lower endof l the frame to each of the legs;. a twee -part platform havin ltwo axially slidable': members; a vertica y movable latch structure.

on each of-said frames'pivotally connected to the respecti vemembers of the platform to vertically adjust the latter and to'hold it in adjusted position," and holding means to hold the legs distended.

2; A device of the character-described 4 having two like. trestles; each trestle 'o'om-: prising four diverging legs,ia.'pai'r on each.

.side;

a platform-supporting frame sus pended from and hinged to the topof each pairof legs and exten din downwardlyto a point near the vertical mid-portion of the trestle, each vertical frame member having spaced apart notches for a latch holding means, for connecting the lower end ,of the frame to the legs; a' two-ipart platform. having two axially slidably inembers'; a ver-;

comprising a two part slidable platform; a 1

trestle connected to the respective ends of the platform, each trestle having four di verging legs divided into two pairs, the wide portion of a leg of each pair being in a plane at right angles to a similar leg to which it is hinged; a frame comprising two vertically disposed side members notched at intervals and hinged to the top ends, of the adjacent pairs of legs; a vertically movable support hinged to the adjacent end of the platform and slidable on the respective member of the frame and a latch carried by the support to engage the notches in the side members in the frame to adjust the height of the latform.

4. A deviceo the character described comprising a platform; a trestle for supporting the platform having four diverging legs hinged together at their top ends in pairs; :1- downwardly extending frame comprising two parallel vertical members having spaced apart notches and hinged at the upper ends to the respective pair of legs; a structure slidable vertically on said vertical members and hinged to the respective ends of the platform; a pair of spring-pressed latch members in said structure for engaging the aforesaid notches and a lever for moving both members out of said notches.

In testimony whereof I hereunto subscribed my name.

MEYER HERMAN. 

